Rollout On Knees muscles:Lower Back, Deltoids, Rectus Abdominis auxiliary muscles:Pectoralis Major, Serratus Anterior, Latissimus Dorsi, Trapezius, Teres Muscles, Obliques, Quadriceps required:Dumbbells (2) / Barbell / EZ Bar optional:Fitness Mat fitness level:Hard exercise type:Strength exercise benefits and how to do Rollout On Knees